Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 575

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-575 A Arbutus MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-575 0 Arbutus MD   829J PAETEC ITEL, LLC 238      
443-575 1 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-575 2 Arbutus MD   829J PAETEC ITEL, LLC 238      
443-575 3 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-575 4 Arbutus MD   829J PAETEC ITEL, LLC 238   2006-11-09   
443-575 5 Arbutus MD   829J PAETEC ITEL, LLC 238      
443-575 6 Arbutus MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-04-10   
443-575 7 Arbutus MD   829J PAETEC ITEL, LLC 238   2011-12-20   
443-575 8 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-02-24   
443-575 9 Arbutus MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-23   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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